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Pattern Syntax Checker Hackerrank Solution Java

Pattern Syntax Checker If   You  want Explanation Check Video:   Sample Input 3 ([A-Z])(.+) [AZ[a-z](a-z) batcatpat(nat Sample Output Valid Invalid Invalid Code: import  java.util.Scanner; import  java.util.regex.*; public   class  Solution {      public   static   void  main(String[] args){         Scanner in =  new  Scanner(System.in);          int  testCases = Integer.parseInt(in.nextLine());          while (testCases> 0 ){             String pattern = in.nextLine();              //Write your code              try {                 Pattern p = Pattern.compile(pattern);                 System.out.println( "Valid" );             } catch (Exception e){                 System.out.println( "Invalid" );             }             testCases--;         }     } }